Mobile devices having a common communication mode

ABSTRACT

A second communication mode can be enabled for a source device and a destination device. Each device can be a mobile device having a first communication mode and a default number for the first communication mode. The default numbers for the source device and the destination device can be stored. A call request can be received from the source device operating in the second communication mode. The call request can be directed to the default number of the destination device. The destination device can be determined as a client based on the default number of the destination device. A communication session can be established between the source device and the destination device over a network upon determining the destination device is an active client.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No. 13/752,838, filed on Jan. 29, 2013, which is a continuation of U.S. application Ser. No. 13/229,355, filed on Sep. 9, 2011 (now U.S. Pat. No. 8,369,847), which claims priority from U.S. Provisional Application No. 61/382,482, filed on Sep. 13, 2010. The application herein claims the benefit of priority of all of the above listed patent applications and hereby incorporates by reference in their entirety the said patent applications.

BACKGROUND

Each mobile telephone (“mobile phone”) is associated with a unique phone number. When a caller places a call from a mobile phone to a destination device, the unique phone number of the mobile phone can be transmitted to the destination device as an identifier. This feature is typically referred to as caller identification, or “Caller ID”.

A mobile phone is generally associated with a first service provider that sends and receives calls to and from the phone, and provides other messaging services to the mobile phone. The first service provider can also provide the mobile phone with access to a network of cellular base stations for sending and receiving calls. Many mobile phones can also be installed with software applications that extend the capabilities of the mobile phone. Some of these software applications offer telecommunication services (e.g., voice over internet protocol, text messaging) provided by a different service provider than the first service provider.

SUMMARY

A second communication mode is enabled for a source device and a destination device. Each device is a mobile device having a first communication mode and a default number for the first communication mode. The default numbers for the source device and the destination device are stored. A call request is received from the source device operating in the second communication mode. The call request is directed to the default number of the destination device. The destination device is recognized as a client, based on the default number of the destination device. It is determined when the destination device is an active client accepting calls in the second communication mode. A communication session is established between the source device and the destination device over a packet-based network when the destination device is determined to be an active client.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram showing an exemplary system for unified caller identification across multiple communication modes.

FIG. 2 is a block diagram showing an exemplary mobile device for unified caller identification across multiple communication modes.

FIG. 3 is a flow chart for an exemplary process for a mobile device with unified caller identification across multiple communication modes.

FIG. 4A is a block diagram showing an exemplary system for mobile devices having a common communication mode.

FIG. 4B is an exemplary display on a mobile device.

FIG. 5 is a flow chart for an exemplary process for a system for mobile devices having a common communication mode.

DETAILED DESCRIPTION

Many mobile phones can be installed with software applications that extend the capabilities of the mobile phone. Some of these software applications can include additional communication services offered by a service provider (“second service provider”) that is different from the first service provider associated with the mobile phone. For example, some second service providers may sell or offer Voice-Over-Internet-Protocol (VOIP) applications for installation on a mobile phone. These VOIP applications allow a user of the mobile phone to make calls using VoIP services offered through the second service provider, instead of making the call through the first service provider. Advantages of going through a second service provider may include, for example, lower calling costs, greater flexibility in handling calls, and greater variety of services available to the user.

Each mobile phone is typically associated with a phone number that is used by default (“default phone number”). Typically, each installed VOIP application also can be associated with a phone number (“application phone number” or “second phone number”) that identifies the mobile phone when a user makes calls using the VOIP application. In some implementations, the application phone number and the default phone number of the mobile phone can be different. In implementations where both numbers are different, having two different phone numbers for the same mobile phone may lead to unneeded complexity and confusion for the user, as the user must now manage at least two different phone numbers for the same mobile phone. The user's contacts must also deal with additional complexity and confusion, as the user may be calling from two different phone numbers depending on which service provider is used. This is especially undesirable for small-business owners who want to avoid confusing prospective and existing customers of the origin of their business calls.

Exemplary System for Unified Caller Identification Across Multiple Communication Modes

FIG. 1 is a block diagram showing an exemplary system for unified caller identification across multiple communication modes. The system can include a mobile device 101, a network 103, a network 105, a first service provider 107, a second service provider 109, and destination devices 111 and 113. Although the destination devices 111 and 113 are each illustrated as a desktop landline phone, one skilled in the art would readily recognize that destination devices 111 and 113 are not limited to a desktop landline phone, and can be any device for receiving a phone call, such as, without limitation, a mobile phone, a fax machine, a videophone, and the like.

In some implementations, the mobile device 101 can operate in a first communication mode when the mobile device 101 communicates through the first service provider 107 to call the destination device 111. In some implementations, the mobile device 101 also can operate in a second communication mode when the mobile device 101 communicates through the second service provider 109 to call the destination device 113, as will be discussed in greater detail below.

The mobile device 101 can be in wireless communication with networks 103 and 105. The mobile device 101 can be a mobile cellular phone such as, for example, a smartphone, or can be any other mobile device having call functions. The first service provider 107 can be in communication with the network 103. The network 103 can include various signal channels and networks that a call can pass through in order to reach a caller receiving the call using the destination device 111. The network 103 can include, without limitation, cellular networks, public switched telephone networks (PSTN), packet-switched networks such as the Internet, wireless networks such as wireless local area networks (WLAN) or WiFi networks, and the like, and the various gateways interconnecting the different types of networks. The destination device 111 also can be in communication with the network 103. As shown, a call placed from the mobile device 101 to the destination device 111 via the first service provider 107 can be represented by a dashed line 115.

The second service provider 109 can be in communication with the network 105. Similar to the network 103, the network 105 can include various signal channels and networks that a call may pass through in order to reach a caller at the destination device 113. The network 105 can include, without limitation, cellular networks, public switched telephone networks (PSTN), packet-switched networks such as the Internet, wireless networks such as wireless local area networks (WLAN) or WiFi networks, and the like, and the various gateways interconnecting the different types of networks. In some implementations, the network 105 can overlap with the network 103. In other implementations, both networks 103/105 can be separate and distinct with no overlapping coverage. As shown, a call placed from the mobile device 101 to the destination device 113 via the second service provider 109 can be represented by a dashed line 119.

When operating in a first communication mode, the mobile device 101 can place an outgoing call 115 to the destination device 111 via a first service provider 107. The call 115 can be routed by the first service provider 107 through the network 103 to the destination device 111. The outgoing call 115 can include an identifier 117 that identifies the mobile phone 101 to the destination device 111. In some implementations, the identifier 117 can be a unique phone number (e.g., “650-555-1212”) associated with the mobile phone 101, or other identifying information unique to the mobile device 101. In some implementations, in the first communication mode, the mobile device 101 can place the outgoing call 115 using a cellular network offered by the first service provider 107.

When operating in the second communication mode, the mobile device 101 can place an outgoing call 119 to the destination device 113 via a second service provider 109. In some implementations, the second communication mode can be enabled by installing a telephony application from the second service provider 109 onto the mobile device 101. The mobile device 101 can enable or switch to the second communication mode when a user places the outgoing call 119 using the installed telephony application. Such telephony applications and other applications are readily available for download and installation onto mobile devices from online stores such as, for example, the Apple iTunes™ App Store, the Android Market, and others.

In some implementations, the second communication mode can be enabled by use of a device driver installed onto the mobile device 101 rather than a software application. In some implementations, the second communication mode can be enabled through software, device drivers, or other functionalities that are built-in to or pre-installed on the mobile device 101. One skilled in the art would recognize that the second communication mode as illustrated also can be enabled by other mechanisms, and is not limited to those discussed above.

The outgoing call 119 can be routed by the second service provider 109 through the network 105 to the destination device 113. The call 119 can include an identifier 121 that identifies the mobile device 101 to the destination device 113. In some implementations, the identifier 121 used in the second communication mode can be the same as the identifier 117 used in the first communication mode. In these implementations, a user calling from the mobile device 101 in both the first communication mode and the second communication mode can be identified with the same identifier to the destination device 113.

In some implementations, the mobile device 101 can operate in the second communication mode using VOIP telephony. For example, the second service provider 109 can provide VoIP services that can be accessible to a user who installs a VOIP application from the second service provider 109 onto the mobile device 101. It should be noted that although the term “VOIP” includes the word “voice”, VOIP services are not limited to voice communications, as VOIP services can include various forms of telecommunications transmitted over IP, such as, without limitation, facsimile communications, video communications, text communications, and data communications.

In some implementations, the network accessibility of the mobile device 101 can be limited while operating in the second communication mode. For example, the mobile device 101 can only send signals via a wireless local area network (WLAN) while operating in the second communication mode. All calls placed from the mobile device 101 can be transmitted over the WLAN and routed to the second service provider 109. The WLAN (also referred to sometimes as “WiFi network”) is typically designed according to a standard within the Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards.

In some implementations, making calls over the WLAN while operating in the second communication mode can be advantageous for the mobile device 101, in comparison to using cellular transmissions in the first communication mode. Exemplary advantages can include, without limitations, better signal strength due to closer proximity to a WiFi access point, higher bandwidth, and lower calling costs since WiFi access may be less expensive than paying for a subscription to the first service provider 107. WiFi access is even available in some areas for free to users and callers.

In some implementations, the mobile device 101 can be restricted from making calls in a first communication mode. This may be the case when the mobile device 101 is not a phone by default. For example, certain mobile devices (such as the Apple® iPod Touch®, the Apple® iPad®, the Kindle®, etc.) are capable of communicating with a wireless network such as a WLAN. These devices are computing devices, but are not mobile phones by default. However, software applications from second service providers 109 can still be installed onto such devices to enable users from making calls over the wireless network through the second service providers 109.

In some implementations, the second communication mode need not always be available to a user. For example, the mobile device 101 may be required to be in close proximity to a WLAN in order to place a call or send the identifier to the receiving device in the second communication mode. Where no WLAN is nearby, the mobile device 101 can switch back to the first communication mode so that an outgoing call can be placed and the identifier sent.

In some implementations, the choice of using the first communication mode or the second communication mode is left to the user. The user can decide in which mode to operate the mobile device 101 when a call is placed. In some implementations, the choice of using the first or second communication mode is not left to the user but is based on certain call properties that are examined automatically. For example, the telephony application 215 may analyze the available communication modes to automatically determine the preferred mode to use to place a call. One property that can be considered is the cost of a call. The telephony application 215 can have access to cost information, such as the charge per minute of a call in each communication mode. The communication mode that charges the least per minute can be selected. In this manner, the telephony application 215 can perform least cost routing.

Another property that can be considered is the location of the mobile device 101. For example, the communication mode selected can depend on whether the mobile device 101 is roaming outside of its home network, or whether the call would be considered a local, long-distance, or international call, etc. Another property to consider is the strength of the call signal available in each communication mode. The communication mode that offers the best signal strength can be selected. The above-described functionality is not limited to being a part of telephony application 215. For example, it can be part of a software application separate from the telephony application 215, or part of the native capabilities (e.g., built-in device drivers or software) of mobile device 101, or.

Exemplary Mobile Device for Unified Caller Identification Across Multiple Communication Modes

FIG. 2 is a block diagram showing an exemplary mobile device 101 for unified caller identification across multiple communication modes. The mobile device 101 can include a memory 203, an identifier (ID) 117, a communication subsystem 205, a processor 207, an input subsystem 209, and an output subsystem 211, which can be coupled to bus 213 or other communication signaling mechanism(s) for interconnecting the components.

The input subsystem 209 can include input devices (which can be built-in or external to the mobile device 101) such as, without limitation, touchscreen, buttons, switches, wheels, keyboard or mouse/pointer, microphone, GPS receiver, camera, sensors (e.g., sensors for motion, light, orientation, speed, acceleration, temperature).

The output subsystem 211 can include output devices (which can be built-in or external to the mobile device 101) such as, without limitation, a display, speaker, lights, and the like.

The mobile device 101 can include a communication subsystem 205 for communicating with a network. Depending on the capabilities and functionality of the mobile device 101, the communication subsystem 205 can include a first radio subsystem 206 for communicating and transmitting signals with a cellular network 225. The communication subsystem 205 also can include a second radio subsystem 208 for communicating and transmitting signals with a WLAN 227.

The processor 207 can execute instructions stored in the memory 203. The memory 203 stores instructions for an operating system, device drivers, software applications, and the like. The memory 203 also can store instructions for a telephony application 215.

The identifier 117 can be a unique phone number (e.g., “650-555-1212”) associated with the mobile phone 101 when the mobile phone 101 is used in the first communication mode, or other identifying information unique to the mobile device 101.

In some implementations, the telephony application 215 can be a software program installed on the mobile device 101. The telephony application 215 can include a caller ID routine 221 and a call control module 223. These modules are shown as separate modules in a single application. Depending on the application, these modules also can be combined into one or more modules or found in separate applications as desired. The mobile device 101 can operate in the second communication mode when the telephony application 215 is used to make a call.

The call control module 223 can handle all of the call setup and call handling necessary to make a call through the second service provider. The caller ID routine 221 can detect the identifier 117, and provide the detected identifier 117 to the call control module 223 to be used in the second communication mode. The call control module 223 can send the identifier 117 to the call control module 223 whenever a call is placed in the second communication mode. In some implementations, the caller ID functionality can be disabled such that no identifier is sent when a call is placed in the second communication mode.

In some implementations, the caller ID routine 221 can access or detect the identifier 117 used by the mobile device 101 in the first communication mode. For example, the caller ID routine 221 can run a system query, or detect settings of the mobile device 101. The same identifier 117 can then be used by the call control module 223 in identifying the mobile device 101 when placing a call while operating in the second communication mode.

In some implementations, the caller ID routine 221 can prompt a user to enter an identifier associated with the mobile device 101. Prompting for a user-entered identifier may be necessary when the caller ID routine 221 cannot access the identifier 117 stored in the mobile device 101. In implementations where the mobile device 101 is a non-phone device that carries little or no phone functionalities, there may not be an identifier 117 associated with the mobile device 101 at all.

In some implementations, upon receiving the user-entered identifier, the caller ID routine 221 can perform verification to verify the user-entered identifier. Performing verification can help ensure that the user is actually authorized to use the device associated with the user-entered identifier. There are various ways to verify a user-entered identifier. In some implementations, the second service provider 109 can send a text message (e.g., an SMS message) containing a verification code to the user-entered identifier for verification. If the user is in actual possession of the mobile device associated with the user-entered identifier, then the user will receive the verification code and send the verification code to the second service provider 109 to verify possession.

In other implementations, the second service provider 109 can call the user-entered identifier (e.g., via administrators or machine-enabled calls) and verify in person that the user is in actual possession of the associated mobile device. Other verification methods will be discussed below.

In some implementations, the call control module 223 can utilize Session Initiation Protocol (SIP) to communicate with the second service provider 109. SIP is a signal protocol used in IP telephony to, for example, set up, control, and terminate call sessions. More details regarding SIP can be found in RFC 3261 from the Internet Engineering Task Force (IETF).

Exemplary Process for a Mobile Device with Unified Caller Identification Across Multiple Communication Modes

FIG. 3 is a flow chart for an exemplary process for a mobile device with unified caller identification across multiple communication modes. The operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It is also to be understood that additional or alternative operations may be employed.

At 301, an identifier for a mobile device in a first communication mode can be acquired. For example, the mobile device can be identified by a phone number while operating in a first communication mode. When a call is placed from the mobile device while the mobile device operates in the first communication mode, the phone number can be sent to a destination device to identify the mobile device.

At 303, the accessibility of the identifier can be determined. If the identifier cannot be accessed while the mobile device is operating in the second communication mode, then the user can be prompted to enter the identifier. In some cases, the identifier may not be accessible where the mobile device does not allow installed software applications to access the identifier, or when the mobile device does not operate as a phone by default.

If the identifier can be accessed from the mobile device, then a determination is made at 304 whether to verify the identifier. In some cases, the identifier will be verified as will be discussed at 307 below. In some cases, the identifier will not be verified, and a call can be placed to a destination device, as will be discussed at 309 below.

At 305, a user can be prompted for an identifier if the identifier is not accessible. For example, the telephony application can display a prompt on the mobile device for a user to enter an identifier for the mobile device. The user can enter the phone number of the mobile device, where one exists and is known to the user. The user-entered identifier should match the phone number of the mobile device. When the mobile device does not have phone capabilities by default, then the user can enter the phone number of another telephonic device associated with the user, for example an alternate phone where the user can be reached (e.g., home phone or office phone).

At 307, the identifier can be verified. For example, a second service provider can verify that the user is actually in possession of the mobile device or other telephonic device associated with the phone number entered by the user, and that the user is authorized to use the phone number so as to reduce the risk of fraud, unauthorized usage, or impersonation by a user.

Verification can be accomplished in various ways. For example, the telephony application can send the user-entered phone number to the second service provider. In response, the second service provider can generate a verification code, and send the verification code to the user-entered phone number as part of a Short Message Service (SMS) text message. Once the user receives the verification code (either at the mobile device or other associated telephonic device), the user can send the verification code back to the second service provider to complete verification. In another example, the second service provider can simply call the phone number entered by the user, and verify in person or through machine that the user is authorized to use the phone number.

In some implementations, the second service provider 109 can call the user at the user-entered identifier and play a code (e.g., via administrators or machine-enabled calls) for the user. The user can then contact the second service provider 109 (e.g., via a designated phone number or website) and enter the code to verify possession.

In some implementations, the second service provider 109 can provide a code to the user via email or user-specific web page (e.g., the user's account webpage), and request a call back from the user on the mobile device associated with the user-entered identifier. Once the user calls back with the code, the second service provider 109 receives the identifier for the mobile device and can verify that it matches the user-entered identifier.

In some implementations, the second service provider 109 can provide a dedicated phone number to the user (e.g., through email or a user-specific web page) to call back, using the mobile device associated with the user-entered identifier. Once the user calls back, the second service provider 109 receives the identifier for the mobile device, and can compare the user-entered identifier with the received identifier and verify a match.

At 309, a call can be placed to a destination device while operating in the second communication mode. For example, the call can be sent using the telephony application via the second service provider.

At 311, the identifier can be sent to the destination device while operating in the second communication mode. It should be noted that operations 309 and 311 (as well as all the other operations in FIG. 3) need not be performed in the order listed. For example, the identifier can be sent as part of the call setup and received at the destination device before the call is completed, since the call may never be completed if no one at the destination device answers the call.

Exemplary System for Mobile Devices Having a Common Communication Mode

FIG. 4A is a block diagram showing a system 400 for mobile devices having multiple communication modes. As shown, the system 400 can include one or more mobile devices 401A-401C, a network 403, a network 405, a first service provider 407, and a second service provider 409.

The mobile devices 401A-401C can be in wireless communication with network 403 and network 405. For the sake of simplicity and brevity, mobile devices 401A-401C will be referred to as mobile devices 401. The mobile devices 401 can be a mobile cellular phone such as, for example, a smartphone, or can be any other mobile device having call functions. The first service provider 407 can be in communication with the network 403. The network 403 can include various signal channels and networks that a call can pass through in order to reach a caller receiving the call. The network 403 can include, without limitation, cellular networks, public switched telephone networks (PSTN), packet-switched networks such as the Internet, wireless networks such as wireless local area networks (WLAN) or WiFi networks, and the like, and the various gateways interconnecting the different types of networks.

The second service provider 409 can be in communication with the network 405. The network 405 can be the Internet or other packet-based networks, and includes wireless Internet networks such as WLAN and WiFi networks. The network 405 can be in communication with the network 403 through a gateway (not shown).

The second service provider 409 can include a call server 417, a client database 419, and optionally a presence server 421. The call server 417 can make and receive calls over the packet-based network 405 to and from one or more clients such as the mobile devices 401A-401C. The client database 419 can store default numbers for all clients (e.g., mobile devices 401A-401C) of the second service provider. The presence server 421, in some implementations, can determine whether a client is currently active or inactive (e.g., whether any one of the mobile devices 401A-401C is active or inactive).

In some implementations, the mobile devices 401A-401C can operate in a first communication mode and a second communication mode. As shown in FIG. 4, the first communication mode in the mobile device 401 can be expressed by a number “1” in a first portion of the mobile device 401. The second communication mode in the mobile device 401 can be expressed by a number “2” in a second portion of the mobile device 401. The communication mode in which the mobile device 401 is active and operates can be expressed by shading in the relevant portion. For example, the mobile device 401A is operating in the second communication mode because portion “2” is shaded for the mobile device 401A.

As previously described, the mobile device 401 can operate in the first communication mode when the mobile device 401 makes or receives calls through the first service provider 407. The mobile device 401 operates in the second communication mode when the mobile device 401 makes or receives calls through the second service provider 409. While not explicitly shown in FIG. 4, in some implementations, the mobile device 401 can operate and be active simultaneously in both first and second communication modes.

As shown, a call placed from the mobile device 401A to the mobile device 401B can be represented by a dashed line 415. When the mobile device 401A makes a call to the mobile device 401B, the mobile device 401A can be assumed as a source device, and the mobile device 401B can be assumed as a destination device. Similarly, a call placed from the mobile device 401A to the mobile device 401C can be represented by a dashed line 413. When the mobile device 401A makes a call to the mobile device 401C, mobile device 401A can be assumed as a source device, and mobile device 401C can be assumed as a destination device.

In some implementations, the mobile devices 401A-401C can share a common second communication mode. For example, when the mobile devices 401A-401C operate in a common communication mode, the mobile devices 401A-401C can make and receive calls through the same second service provider 409. In some implementations, the mobile devices 401A-401C can include hardware and/or software components (e.g., applications or drivers) installed thereon that allow the mobile devices 401A-401C to receive telecommunication services from the second service provider 409. Other methods of enabling a second communication mode as discussed above also are applicable to the system 400.

As discussed above, the presence server 421 can determine whether a client is currently active or inactive. In some implementations, the presence server 421 can determine which clients are available to receive calls in a second communication mode (“active clients”), and which clients are unable to receive calls in the second communication mode (“inactive clients”). For example, the mobile devices 401A and 401B are active clients of the second service provider 409 if the mobile devices 401A and 401B are available to receive calls in a second communication mode, and the mobile device 401C is an inactive client of the second service provider 409 if the mobile device 401C is not available to receive calls in the second communication mode. In some implementations, a mobile device can be treated as an active client when the hardware and/or software components installed thereon to enable the second communication mode have been activated on the mobile device, running either in the foreground or background (e.g., as a background process that is not visible to a user of the mobile device). Similarly, in some implementations, a mobile device can be treated as an inactive client when the hardware and/or software components installed thereon is neither active nor running on the mobile device.

In some implementations, one or more processes can be executed to determine whether a particular client is active. For example, the presence server 421 can periodically poll one or more clients to determine which client responds to the presence server 421. In some implementations, a client can periodically send (e.g., on a scheduled or random basis) or return (e.g., in response to the polling) a message to the presence server 421 to indicate it is an active client. In some implementations, the presence server 421 can set a time-out limit, where a particular client can be considered active for a designated time period after a call is made to or from that client, and considered inactive after such time period expires without further contact with the client. In some implementations, the second service provider 409 can include a client database 410 in which the presence server 421 can store the active or inactive status of a client in the client database 419, and update the corresponding status of the client in the client database 419 where necessary.

One or more advantages can be realized when two mobile devices (e.g., mobile device 401A and 401B) are both active clients of a common second service provider 409. For example, the second service provider 409 can set up a call (including, without limitation, the exchanging of video, fax, text, or data) between the mobile device 401A and the mobile device 401B completely within the network 405, which can be a packet-based network for rendering VOIP telephony and other VOIP services. This process can result in cost savings for the second service provider 409. For example, the second service provider 409 would normally incur fees or other expenses for accessing the network 403. Such fees, however, can be avoided if the second service provider 409 does not route or transfer a call to the network 403. As a result, fees avoided can be translated into savings that can be passed on to users of the mobile device 401A-401B. Consequently, the system 400 can be designed in a manner that allows both the second service provider 409 and the mobile devices 401A-401C to connect calls while the mobile devices 401A-401C operate in a common communication mode and are active clients of the same service provider.

Similar to the mobile devices 401A and 401B, the mobile device 401C also can operate in a second communication mode and as a client of the second service provider 409. As shown in FIG. 4A, the mobile device 401C, an inactive client, operates in a first communication mode, and is therefore unable to receive calls in the second communication mode. Where a call 413 is made from the mobile device 401A to the mobile device 401C, the call 413 could be subject to additional fees since the second service provider must route the call 413 through the network 403 (including the PSTN) and the first service provider 407.

FIG. 4B shows an exemplary display 423 that can be shown on the mobile device 401A when the mobile device 401A operates in a second communication mode. The display 423 can show a contact list 424 that can be stored on the mobile device 401A. The contact list 424 shown in the display 423 can include names that represent corresponding phone numbers stored in the memory of the mobile device 401A. When one of the contacts in the contact list 424 becomes an active client of the second service provider 409, an active status associated with that contact can be included in the display 423. Displaying an active status on the display 423 allows a user of the mobile device 401 to realize when a call to the indicated contact can be completed through the same second service provider (and thus could be eligible for potential savings). For example a contact that is an active client (e.g., “Peggy Barnes” and “John Ellis”) can be displayed with an indicator 425 or other visual presentation (e.g., special icons or text) to show the contact is an active client.

In some implementations, the mobile device 401A can send its contact list 424 to the presence server 421 to determine which contacts in the contact list 424 is an active client. In some implementations, the presence server 421 can scan the contact list 424 and perform a comparison of the contact list 424 with one or more records stored in the client database 419 to determine if any contact in the contact list 424 also is an active client. Once the status has been determined, the presence server 421 can indicate to the mobile device 401A which, if any, contacts on the contact list 424 are active clients. In some implementations, the presence server 421 can update the status of those contacts in the client database 410 whenever the status of a contact has changed from active to inactive, or inactive to active. The mobile device 401A can display the contact list 424 after the contact list 424 has been scanned by the presence server 421. For example, the contact list 424 can be displayed on the display 423 (e.g., a touch screen) of the mobile device 401A, such that a call can be initiated by a user by tapping or touching the display 423 at a location corresponding to a desired contact.

As explained above, the default number for a mobile device is normally associated with a first communication mode or a default service provider. Where the same mobile device is subscribed to a second service provider to enable a second communication mode (e.g., to receive different type of communication services), the mobile device subscribing to the second service provider typically receives a second number or identifier that is different from the default number of the mobile device. The second service provider assigns a second number to the mobile device, which is used when the mobile device operates in the second communication mode. The second service provider then identifies the mobile device as a client if a call request is addressed to the second number of the mobile device. If a call request is addressed to a default number of the mobile device, the second service provider will not recognize the mobile device as a client unless the default number is also provided. Thus, if a call is made from a client source device to a client destination device using a default number of the client sour device, the second service provider will not recognize either or both the source device and destination device as clients. In the absence of such knowledge that either the source device or the destination device is a client, the second service provider may complete the call request, by incurring extra charges, through an alternative network (e.g., the network 403) for another service provider (e.g., first service provider 407) to reach the destination device.

Referring back to FIG. 4A, with unified caller identification across the two communication modes, the mobile devices 401A-401C can be registered with the second service provider 409 using their respective default phone number when operating in a second communication mode. Thus, a destination device (e.g., mobile device 401B) can be recognized as a client when the second service provider receives a call request addressed to the default number of the destination device. When the source device (e.g., mobile device 401A) is also a client, the second service provider 409 can establish a communication session between the source and destination devices over the network 405.

FIG. 5 is a flow chart for an exemplary process 500 for a system for mobile devices having a common communication mode. The operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It is also to be understood that additional or alternative operations may be employed.

At 501, a second communication mode can be enabled for a plurality of mobile devices. In some implementations, each mobile device can operate in a first communication mode and be associated with a default number for the first communication mode. For example, a source mobile device (such as the mobile device 401A) and a destination mobile device (such as the mobile device 401B) can be installed with hardware and/or software components that enable the respective device to operate in a second communication mode under which the source mobile device and the destination device can receive VOIP services and other communications services from a second service provider. These VOIP services and other communications services can be services that are additional to those services received by the mobile devices operating in the first communication mode.

At 503, the default numbers for the plurality of mobile devices can be stored. For example, the default numbers for the mobile device 401A and 401B can be stored in the client database 419. These default numbers can be provided by the mobile devices when the mobile device 401A and 401B are registered with the second service provider (e.g., when the mobile device 401A and 401B are first enabled with the second communication mode). Unlike conventional communications systems in which the default numbers may not be available to the second service provider because a new number (different from the default number) is assigned to each mobile device operating in a second communication mode, such information can be readily stored in the client database 419. By storing the default numbers in the client database 419, the second service provider 409 can determine when a source mobile device or a destination mobile device is a client.

At 505, a call request can be received from a source device operating in the second communication mode. The call request can be directed to the default number of a destination device. For example, the call server 417 of service provider 409 can receive a call request 415 from the mobile device 401A, and the call request 415 can be addressed to the default number of the mobile device 401B.

At 507, the destination device can be recognized as a client, based on the default number of the destination device. For example, the call server 417 can check the client database 419 to determine if the default number for the mobile device 401B is listed.

At 509, the destination device can be determined as an active client accepting calls in the second communication mode. In some implementations, such a determination can be performed by the presence server 421. For example, the presence server 421 can periodically poll the clients to determine which of the clients responds to the polling. In some implementations, a client also can periodically send a message to the presence server 421 to indicate the client is an active client. The presence server 421 can set a time-out limit, where a particular client can be treated as an active client for a designated time period after a call is made to or from that client, and as an inactive client after such time period expires without further contact with the client. The presence server 421 can store the active or inactive status of a client in the client database 419, and update the status where necessary.

At 509, the destination device can be determined as an active client accepting calls in the communication mode. In some implementations, an attempt to establish a communication session with the destination device can be made regardless of whether the destination device is (or is not) an active client accepting calls in the second communication mode. For example, the call server 417 can attempt to establish a call with a destination device as if the destination device were an active client. Upon establishing the call successfully, then the destination device can be treated as an active client (e.g., mobile device 401B). In some implementations, operation 509 is optional, as indicated by the dash lines.

If the call is not successfully established, then it can be determined that the destination device is not an active client, and the call cannot be completed with two mobile devices in a common communication mode. For example, referring to FIG. 4A, it can be determined that the destination device 401C is not an active client. More specifically, an attempt by the call server 417 to complete a call between the mobile device 401A and the mobile device 401C as if both devices were active clients in the second communication mode would fail since the mobile device 401C is not an active client. In some implementations, the call server 417 can perform one or more additional attempts to establish the call through an alternative network (e.g., the network 403) and another service provider (e.g., the first service provider 407).

In some implementations, the source device can optionally be notified when the destination device is also a client of the same second service provider. For example, if the presence server 421 determines that the mobile device 401B is also an active client, the mobile device 401A can be notified of this status. This notification can allow a user of the mobile device 401A to make intelligent calls, thus potentially saving unnecessary calling costs. For example, FIG. 4B shows an exemplary display where a user can determine when any of the listed contacts in the contact list is an active client.

At 511, a communication session can be established between the source device and the destination device over a network (e.g., packet-based network) when the destination device is an active client. For example, the call server 417 can establish a call 415 between the mobile device 401A and 401B over the Internet using VOIP protocols, such as Session Initiation Protocol (SIP). The call 415 can be in the form of a voice call, video, text, and/or other types of data communications.

Although the present invention has been described in detail with reference to particular implementations, persons possessing ordinary skill in the art to which this invention pertains will appreciate that various modifications and enhancements may be made without departing from the spirit and scope of the claims that follow.

A few implementations have been described in detail above, and various modifications are possible. The disclosed subject matter, including the functional operations described in this specification, can be implemented in electronic circuitry, computer hardware, firmware, software, or in combinations of them, such as the structural means disclosed in this specification and structural equivalents thereof, including potentially a program operable to cause one or more data processing apparatus to perform the operations described (such as a program encoded in a computer-readable medium, which can be a memory device, a storage device, a machine-readable storage substrate, or other physical, machine-readable medium, or a combination of one or more of them).

The term “system” encompasses all apparatus, devices, and machines for processing data, including by way of example a programmable processor, a computer, or multiple processors or computers. The system can include, in addition to hardware, code that creates an execution environment for the computer program in question, e.g., code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them.

A program (also known as a computer program, software, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, or declarative or procedural languages, and it can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A program does not necessarily correspond to a file in a file system. A program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub programs, or portions of code). A program can be deployed to be executed on one computer or on multiple computers that are located at one site or distributed across multiple sites and interconnected by a communication network.

These computer programs (also known as programs, software, software applications or code) can include machine instructions for a programmable processor, and can be implemented in a high-level procedural and/or object-oriented programming language, and/or in assembly/machine language. As used herein, the terms machine-readable medium and computer-readable medium refer to any computer program product, apparatus and/or device (e.g., magnetic discs, optical disks, memory, Programmable Logic Devices (PLDs)) used to provide machine instructions and/or data to a programmable processor, including a machine-readable medium that receives machine instructions as a machine-readable signal. The term machine-readable signal refers to any signal used to provide machine instructions and/or data to a programmable processor.

Suitable processors for the execution of a program of instructions include, by way of example, both general and special purpose microprocessors, and the sole processor or one of multiple processors of any kind of computer. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. The essential elements of a computer are a processor for executing instructions and one or more memories for storing instructions and data. Generally, a computer will also include, or be operatively coupled to communicate with, one or more mass storage devices for storing data files; such devices include magnetic disks, such as internal hard disks and removable disks; magneto-optical disks; and optical disks. Storage devices suitable for tangibly embodying computer program instructions and data include all forms of non-volatile memory, including by way of example semiconductor memory devices, such as EPROM, EEPROM, and flash memory devices; magnetic disks such as internal hard disks and removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks. The processor and the memory can be supplemented by, or incorporated in, ASICs (application-specific integrated circuits).

While this specification contains many specifics, these should not be construed as limitations on the scope of what may be claimed, but rather as descriptions of features that may be specific to particular implementations. Certain features that are described in this specification in the context of separate implementations can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.

Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Moreover, the separation of various system components in the implementations described above should not be understood as requiring such separation in all implementations.

Other implementations fall within the scope of the following claims 

What is claimed is:
 1. (canceled)
 2. A method for establishing a communication session with a destination device that is served by a first service provider when operating in a first communication mode and a second service provider when operating in a second communication mode, the method comprising: receiving a call from a source device, wherein the call is directed to a first number, and wherein the source device is operating in the second communication mode; determining that the first number is a number for the destination device with the first service provider; determining that the destination device is an active client of the second service provider; and in response to determining that the destination device is an active client of the second service provider, establishing a communication session between the source device and the destination device in the second communication mode.
 3. The method of claim 2, further comprising: enabling the second communication mode for the source device and the destination device.
 4. The method of claim 3, wherein enabling the second communication mode for the destination device comprises: providing Voice-Over-Internet-Protocol (VOIP) software for installation on the destination device.
 5. The method of claim 4, wherein determining that the destination device is an active client comprises: determining that the destination device is running the VOIP software.
 6. The method of claim 2, further comprising: sending a notification to the source device that the destination device is an active client of the second service provider.
 7. The method of claim 2, wherein the destination device is identified by the number in both the first communication mode and the second communication mode.
 8. The method of claim 2, wherein the destination device is identified by the first number when operating in the first communication mode and a second, different number when operating in the second communication mode.
 9. The method of claim 2, further comprising: receiving a second call from the source device, wherein the second call is directed to a third number; determining that the third number is a number for a third device when operating in the first communication mode; determining that the third device is an inactive client of the second service provider; and in response to determining that the third device is an inactive client of the second service provider, routing the second call to the third device in the first communication mode.
 10. A system comprising one or more computers and one or more storage devices storing instructions that when executed by the one or more computers cause the one or more computers to perform operations for establishing a communication session with a destination device that is served by a first service provider when operating in a first communication mode and a second service provider when operating in a second communication mode, the operations comprising: receiving a call from a source device, wherein the call is directed to a first number, and wherein the source device is operating in the second communication mode; determining that the first number is a number for the destination device with the first service provider; determining that the destination device is an active client of the second service provider; and in response to determining that the destination device is an active client of the second service provider, establishing a communication session between the source device and the destination device in the second communication mode.
 11. The system of claim 10, the operations further comprising: enabling the second communication mode for the source device and the destination device.
 12. The system of claim 11, wherein enabling the second communication mode for the destination device comprises: providing Voice-Over-Internet-Protocol (VOIP) software for installation on the destination device.
 13. The system of claim 12, wherein determining that the destination device is an active client comprises: determining that the destination device is running the VOIP software.
 14. The system of claim 10, the operations further comprising: sending a notification to the source device that the destination device is an active client of the second service provider.
 15. The system of claim 10, wherein the destination device is identified by the first number in both the first communication mode and the second communication mode.
 16. The system of claim 10, wherein the destination device is identified by the first number when operating in the first communication mode and a second, different number when operating in the second communication mode.
 17. The system of claim 10, the operations further comprising: receiving a second call from the source device, wherein the second call is directed to a third number; determining that the third number is a number for a third device when operating in the first communication mode; determining that the third device is an inactive client of the second service provider; and in response to determining that the third device is an inactive client of the second service provider, routing the second call to the third device in the first communication mode.
 18. A non-transitory computer storage medium encoded with a computer program, the computer program comprising instructions that, when executed by one or more computers, cause the one or more computers to perform operations for establishing a communication session with a destination device that is served by a first service provider when operating in a first communication mode and a second service provider when operating in a second communication code, the operations comprising: receiving a call from a source device, wherein the call is directed to a first number, and wherein the source device is operating in the second communication mode; determining that the first number is a number for the destination device with the first service provider; determining that the destination device is an active client of the second service provider; and in response to determining that the destination device is an active client of the second service provider, establishing a communication session between the source device and the destination device in the second communication mode.
 19. The computer storage medium of claim 18, the operations further comprising: receiving a second call from the source device, wherein the second call is directed to a third number; determining that the third number is a number for a third device when operating in the first communication mode; determining that the third device is an inactive client of the second service provider; and in response to determining that the third device is an inactive client of the second service provider, routing the second call to the third device in the first communication mode.
 20. The computer storage medium of claim 18, wherein the destination device is identified by the first number in both the first communication mode and the second communication mode.
 21. The computer storage medium of claim 18, wherein the destination device is identified by the first number when operating in the first communication mode and a second, different number when operating in the second communication mode. 